I wasnt sure which sub forum to post, here or ati section, but i ended to here. Now, firstly correct me if i´m wrong, but i have basic version of Sapphires 4890, and i use AB to oc, and i just few days ago discovered that i can adjust the voltages with AB on this card, i dont know why i had the idea that my gcard didnt support program voltage tuning. Why i got this conclusion, was when using Furmark, i had 940MHz at gpu, and moved the voltage bar to 1.35v and all artifacts where gone. So, i can get gpu to 990 to be stable, and memory to 1170 to be stable, obviously if trying to run vantage with both at max speed, aint working, still working to get max stable numbers. Well, now what i´d actually needed to ask, can i increase the voltages even more with some program tweak or something, or do i need to mod the card, if i´d want to get more volts? Below ss of the current numbers on card Edit: found a techpowerup gputool for it Edit 2: What was the trick to get pass 1000mhz on core?